code: def _unlearnable_action(event: Event) -> bool:
      """Identifies if the action cannot be learned by policies that use story data.
  
      Args:
          event: An event to be checked.
  
      Returns:
          `True` if the event can be learned, `False` otherwise.
      """
      return (
          isinstance(event, ActionExecuted)
          and event.action_name == ACTION_UNLIKELY_INTENT_NAME
      )
  
imports: from collections import defaultdict
  import logging
  import json
  from typing import DefaultDict, Dict, Generator, List, NamedTuple, Optional, Text, Tuple
  from rasa.core.featurizers.tracker_featurizers import MaxHistoryTrackerFeaturizer
  from rasa.shared.core.constants import ACTION_LISTEN_NAME, PREVIOUS_ACTION, ACTION_UNLIKELY_INTENT_NAME, USER
  from rasa.shared.core.domain import Domain, State
  from rasa.shared.core.events import ActionExecuted, Event
  from rasa.shared.core.generator import TrackerWithCachedStates
  from rasa.nlu.tokenizers.tokenizer import Tokenizer
  from rasa.shared.nlu.constants import TEXT
  from rasa.shared.nlu.training_data.message import Message
label_desc: Use image node_id 3 for calling a global function with example usage: _unlearnable_action(event) and returns: unknown